Werfel assumed the top agency post Wednesday after President Barack Obama requested that former acting Commissioner Steven Miller resign following a watchdog report that found lax management led to a two-year targeting of conservative groups seeking tax-exempt status.

Treasury Secretary Jack Lew has instructed Werfel undertake a comprehensive report of the agency within 30 days of taking office — a step Werfel said will help the agency regain the trust of Americans.

“We have a solemn duty to act as responsible, fair and impartial stewards of the taxpayers’ dollars,” Werfel said. “That is why we must work together with the inspector general, the Justice Department and Congress to ensure that responsible parties are held accountable for the inappropriate activities that occurred and that we correct the breakdowns in process and oversight that allowed them to occur.”